| MAC | Maximum Admissible Concentration | - | Computer Acronyms(common) |
| MAC | Methyl Allyl Chloride | - | Computer Acronyms(common) |
| MAC | Main Display Console | - | Organizations |
| MAC | Maintenance Advisory Committee | - | Organizations |
| MAC | Maximum Allowable Concentration | - | Organizations |
| MAC | Maximum Concentration Of Organics | - | Organizations |
| MAC | Mean Aerodynamic Chord | - | Organizations |
| MAC | Mean Aerodynamic Chord | - | Organizations |
| MAC | Military Airlift Command | - | Organizations |
| MAC | Multiaccess Computer | - | Organizations |
| MAC | Macao (ISO 3166 Trigram) -U.S. Military Airlift Command (1966-1992) | - | Astronomy |
| MAC | Machine Aided Cognition | - | Business and Finance |
| MAC | Multiple Access Computer | - | Business and Finance |
| MAC | Manager's Advisory Council | - | Business and Finance |
| MAC | Apple Macintosh Computer | - | Business and Finance |
| MAC | Medium Access Control | - | Business and Finance |
| MAC | mandatory access control
| - | Human Genome |
